Cylinder and concave mill with material return paddle



March 27, 1951 F. RODGERS ,67

CYLINDER AND CONCAVE MILL WITH MATERIAL RETURN PADDLE Filed March 28, 1947 2 Sheets-Sheet 1 IIIIIIXI \J g o INVENTOR.

FEEDEQ/CK 2006512 "(Shawn ATTOE 5Y5 March 27, 1951 F. RODGERS CYLINDER AND CONCAVE MILL WITH MATERIAL RETURN PADDLE 2 Sheets-Sheet 2 Filed March 28, 1947 INVENTOR.

5 WW WW w m D m N m T r A Patented Mar. 27, 1951 UNITED STATES PATENT OFFICE CYLINDER AND CONCAVE MILL WITH MATERIAL RETURN PADDL'E.

Frederick Rodgers, St. James, N. 'Y.

Application March 28, 1947, Serial No. 737,831

3 Claims.

V turning the ground grain quickly rancid. Ma-

chines for processing grain up to the present frequently have combined the grain shattering and sieving operations thereby producing an undesirable separation of the oil globules.

It is an object of the present invention to provide a cylinder and concave mill which produces a grain flour of greatly improved resistance to decomposition, and which is economic in construction and most efficient in operation.

Other objects of the present invention will .be-

come apparent in the course of the following specification.

These objectives have been attained in the present invention by providing a device having a multiplicity of hammers disposed on a cylinder which, rotating at high speed, ricochets the grain kernels and their fragments back and forth between the inner surface of the container in which the cylinder rotates. Screening out the cracked particles of desired size is a separate and distinct operation in this machine. After a grain kernel has passed once through the cracking cycle, particles of predetermined size or less pass through a screen and fragments too large to pass there through are automatically returned for reprocessing. A conveyor removes the finished product.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings showing, by way of example, a preferred embodiment of the inventive idea.

In the drawing:

Figure 1 shows a side elevation of a device constructed in accordance with the principles of the present invention.

Figure 2 shows an end elevation of the same device.

Figure 3 is a vertical sectional View through the line 33 of Figure 1, on an enlarged scale.

Figure 4 is a fragmentary view showing the front elevation of Figure 1, also on an enlarged scale.

Figure 5 is a front elevational view of the adjustable breakin mechanism, enlarged.

Like reference numerals indicate like parts throughout the several views.

Referring now in greater detail to the draw ings, the housing is formed of the semi-cylindrical upper portion In (Fig. 3) mounted on and secured to the lower portion II supported by the endplates I 8 and I9 (Fig. 1) mounted on the base 20. The inlet hopper 2I is mounted on the top of the upper portion II] and the outlet H at the back of the lower portion. Baffle bars I2 (Fig. 3)

are inserted along the interior of the upper portion I0 and at the top of the lower portion II, perpendicular to the end plates I8 and I9 (Fig. 1). Adjustable plates I3 (Fig. 3) shown enlarged in Figure 5, are placed along the interior of the lower section, below the end bafile. A tie rod I3a extends perpendicularly to the plates I3 and through the end plate I8 of the housing or container. Lever bars I3b are hingedly spaced along the tie rod I3a and are fixedly connected at their ends to the plates I3. The projecting end of the tie rod I 3a is threaded and i connected to a handle I4. Thus, the position of these plates is controlledby the handle I4 (Fig. 5) and, being disposed in the channel of grain flow serve to accelerate to the rate of flow. The screen I5 .is inserted over the passageway I6 leading to the subsequently described spiral conveyor 29.

The grinding cylinder 22 (Figs. 3 and 4) is rotatably mounted in the upper part of the housing, and is designated to rotate clockwise as shown by the arrow in Figure 3 on the shaft 23 (Fig. 4) journaled in the end plates I8 and I9 (Fig. 1). The outside surface portion of the cylinder 22 is notched by left and right hand parallel helical threads the protuberances formed thereby hereinafter designated hammers 24 (Fig. 4

The return paddle indicated by numeral 25 (Fig. 3) consists of the blades or fins 2'! attached to the shaft 28 (Fig. 4) disposed to rotate clockwise below the cylinder 22 and is likewise supported by the end plates I 8 and I9 (Fig. l). .A covered opening IBa (Fig. 2) in the end plate I8 (Fig. 1) may he provided for cleaning the paddle chamber, substantially aligned with the base of the rotor return paddle 25.

The spiral conveyor 29 (Figs. 3 and 4) is mounted at the base of the passageway I6 (Fig. 3). The shaft 313 (Fig. 4) of the conveyor is also supported by the end plates I8 and I9 (Fig. 1)

Rotation for the grinding cylinder 22 and return paddle 25 is furnished by the main drive .motor 3! (Fig. 1) mounted on the base 20. A pulley attached to the grinding cylinder driving gear shaft 42 (Fig. 1) actuates a driving gear mounted thereon and meshes with a gear attached to the shaft 23 (Fig. 4) of the grinding cylinder 22. The grinding cylinder driving gear shaft pulley is connected by a belt with a pulley on the main drive motor 3| (Fig. 1)

Likewise, a pulley attached to the return paddle driving gear shaft 26 (Fig. 1) rotates a driving gear attached thereto and meshes with a gear attached to the shaft 23 (Fig. 4) of the paddle.

The pulley of the return paddle is also belt coni nected to a pulley on the main drive motor 3|.

Rotation for the spiral conveyor 29 (Figs. 3

and 4) is furnished by the motor 32 (Figs. 1 and 2) supported at the front by the friction wheel 33 (Fig. 2) in contact with the friction plate 34 and rotated by said motor by the belt 35 passing over pulleys on said motor and friction wheel shafts. At the back, the motor is supported by two castings, one of which is shown by reference numeral 35 (Fig. 2). One of these castings slides freely along a fixed rod, the other is threaded onto the revolving rod 31. By rotating thecrank 33 attached to the rod 31,.the friction wheel 33 may be moved back and forth on the plate 34 thereby varying the speed of rotation as desired. The adjustable speed so developed is transmitted by the belt 39 over a pulley on the shaft of the friction plate, thence to the right angle drive 40, and finally by the belt 4! to a Obviously, l

pulley in the shaft of the conveyor. other means of rotating the cylinder, return paddle, and conveyor could be adopted. 7 The operation of the machine is as follows;

, Grain inserted in the intake hopper 21 (Fig. 1)

is fed by gravity over the grinding cylinder 22. The rate of How .of the grain from the hopper is regulated. by the. hinged valve. 43 (Fig. 1), the

position of which is controlled by the handle 44 on the threaded shaft 45 connected by any suitable means therewith.

A grain kernel after passing through the hopper 2| falls against a hammer 24 (Fig. 4). of the cylinder 22 revolving at high speed. The impact of the grain kernel with the hammer ricochets the grain kernel or the already broken fragments thereof against the interior wall of the housing or one of the bafiies l2-or both from which it is reflected back against the hammer of the revolving cylinder. This process is continued until the fragments of the kernel have passed the last baffie plate and brought in contact with the plates of the speed regulator 13 (Fig. 3)

After passing the speed regulator IS, the kernel fragments are picked up by the blades of the returnpaddle 25, whirled around the axis thereof and thrown against the screen [5. Kernel fragments sufiiciently small to piss through the screen l fall on the spiral conveyor 29 to be moved out of the housing through the outlet I! (Fig. 1).

Kernel fragments too large to pass through the 4 scope or intent of the invention, all of which variations and modifications are to be included within the scope of the present invention.

What is claimed is:

1. In a cylinder and concave mill, a container comprising end and side plates, a rotor, a rotor return paddle, and conveyor means disposed therein, intake opening through said container above said rotor, said rotor having left and right hand helical thread cut on the outside surface portion thereof, said container further comprising bafiie bars disposed at the inside surface portion thereof, spaced substantially around the top of said rotor, said rotor return paddle comprising a shaft, a plurality of fan blades disposed around said shaft, means for supporting said rotor return paddle substantially below said rotor in said container with substantially parallel axes, said container further comprising plates disposed on the inside surface portion thereof between said rotor and rotor return paddle in the path of material forced around said rotor and directed toward said rotor return paddle, passageway leading from vicinity of said rotor return paddle substantially opposite said plates to said conveyor means, outlet means disposed at egress end of said conveyor, concave surface portion disposed substantially around the bottom of said rotor return paddle between said plates and said passageway cooperating with said rotor return paddle, means for revolving said rotor and rotor return paddle toward said plates, and means for actuating said conveyor.

2. In a cylinder and, concave mill according to claim 1, in which at least one end plate is characterized by having a covered aperture formed therein substantially aligned. with. the base of said rotor return paddle. i

.3. In a cylinder and concave mill according to claim 1, in which said passageway is characterized by having a screen disposed across the entrance thereto, said screen being so positioned as to deflect particles of material too large to pas therethrough toward said rotor.

FREDERICK RODGERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 9,383 Tompkins Sept. 21, 1880 8,527 I-Iollingsworth Nov. 18, 1851 60,385 Kemp Dec. 11, 1866 517,104 Harris Mar. 27, 1894 1,439,581 Sedberry Dec. 19, 1922 1,981,415 Kennedy Nov. 20, 1934 2,141,662 Ossing Dec. 27, 1938 2,148,022 Haaland Feb. 21, 1939 FOREIGN PATENTS Number Country Date 831 Australia Jan. 25, 1900 28,578 Australia May 25, 1907 131,272 Germany June 2 1902 430,129 I I Germany June10,- 1926 Sweden Aug. 23,1893 

